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DAC with I?C serial interface

Posted: 05 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:ltc2605? dac? linear technology?

An octal 16-bit voltage output DAC with an I?C serial interface in a 16-pin SSOP package was recently released by Linear Technology Corp.

At 16-bits, the LTC2605 achieves the industry's smallest footprint for octal DACs while improving DC performance over competitive products, said the press release. The device's guaranteed monotonic performance, small size and low power make it suitable for digital calibration, trim/adjust and level setting applications in a wide variety of products. The LTC2605's output buffers deliver excellent drive capability over their entire 2.7V to 5.5V supply voltage range, added Linear Tech. The DAC outputs directly drive capacitive loads up to 1,000pF or current loads up to 15mA and maintain good linearity to within millivolts of VCC or ground. The low output offset (9mV max) provides a starting code voltage closer to ground than competing devices. In addition, low output voltage noise (15?Vp-p) reduces the need for output filtering. A full-scale transition on seven of the eight DACs causes less than 10?V change in the eighth DAC, effectively eliminating crosstalk as a source of error.

The 2-wire I?C compatible interface allows independent control of each DAC by means of a flexible input control word. The LTC2605 provides 27 user-selectable slave addresses, allowing several LTC2605s on the same bus and minimizing address conflicts with other components.

Pricing starts at $14.70 each for the LTC2605 in 1,000-piece quantities.



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